IR tests ok 250v but 500v

[Jimmyb]

Hello, can some give me some advice on what the problem could be with the ring final im checking before changing the cu, did at test with line & netural joined and tested to earth at 250v and got 25Mohms so went to test at 500v and got 0.35Mohm.

thanks jimmy

 

[Deleted member 26818]

Sounds like the insulation is breaking down, or perhaps there is something still connected, which leaks to earth.

 

[Octopus]

Was everything unplugged or switched off in the case of FCU's?

 

[Adam W]

Surge protector still plugged in?

 

[Jimmyb]

Was everything unplugged or switched off in the case of FCU's?

No theres 2 pulgs which can not be unpluged due being behide a big cabinet, they only have lights pluged into them, this is why i joined live & netural and tested between them and earth and i turned off / plugged everything else

Surge protector still plugged in?

I did see one which was unplugged but i will ask if there any i have been able to find

 

[Jimmyb]

Sounds like the insulation is breaking down, or perhaps there is something still connected, which leaks to earth.

Had a feeling that the insulation is breaking down but was hoping otherwise.

 

[Deleted member 9648]

Adam W may be spot on.....0.35megs is a typical surge protector reading.

 

[tony mc]

Loft booster but money is on surge protector dumping to earth at 500v.

Dont forget a plug in oven on the cct hinden away behind a plinth etc!!!!

 

[andekoch]

Agreed surge protector. Hence ok at 250.

 

[Jimmyb]

Just to let you guys know it was a surge protector in the loft for airel booster. Happy days